Copernicus was one of the great polymaths of the Renaissance. He was a mathematician, astronomer, jurist, physician, classical scholar, governor, administrator, diplomat, economist and soldier. He was a Catholic cleric during most of his life too. Some planets required as many as seven circles, creating a cumbersome model many felt was too complicated to have naturally occurred. In , Copernicus distributed a handwritten book to his friends that set out his view of the universe.
In it, he proposed that the center of the universe was not Earth, but that the sun lay near it. He also suggested that Earth's rotation accounted for the rise and setting of the sun, the movement of the stars, and that the cycle of seasons was caused by Earth's revolutions around it.
Finally, he correctly proposed that Earth's motion through space caused the retrograde motion of the planets across the night sky planets sometimes move in the same directions as stars, slowly across the sky from night to night, but sometimes they move in the opposite, or retrograde, direction. In it, Copernicus established that the planets orbited the sun rather than the Earth. He laid out his model of the solar system and the path of the planets.
He didn't publish the book, however, until , just two months before he died. The church did not immediately condemn the book as heretical, perhaps because the printer added a note that said even though the book's theory was unusual, if it helped astronomers with their calculations, it didn't matter if it wasn't really true, according to Famous Scientists.
It probably also helped that the subject was so difficult that only highly educated people could understand it. The Church did eventually ban the book in Copernicus died on May 24, , of a stroke. He was He was buried in Frombork Cathedral in Poland, but in an unmarked grave. Subscribe for fascinating stories connecting the past to the present.
Alexander Graham Bell, best known for his invention of the telephone, revolutionized communication as we know it. His interest in sound technology was deep-rooted and personal, as both his wife and mother were deaf. Galileo Galilei is considered the father of modern science and made major contributions to the fields of physics, astronomy, cosmology, mathematics and philosophy.
Galileo invented an improved telescope that let him observe and describe the moons of Jupiter, the It took nearly a century of research and data to convince the vast majority of the scientific community that human activity could alter the climate of our entire planet. In the s, experiments Eugenics is the practice or advocacy of improving the human species by selectively mating people with specific desirable hereditary traits.
In , the Pacific Railroad Act chartered the Central Pacific and the Union Pacific Railroad Companies, tasking them with building a transcontinental railroad that would link the United States from east to west. Over the next seven years, the two companies would race toward The internet got its start in the United States more than 50 years ago as a government weapon in the Cold War.
For years, scientists and The American Revolution was fought—and won—with guns, and the weapons have become ingrained in U. The origin of firearms began with gunpowder and its invention, mostly Live TV.
He earned the general respect and honour of his contemporaries. For many years he served self-sacrificingly the cause of his native country. But he knew no private, domestic joys.
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